| Author |
Message |
Frank Parker (Parkerfe)
Intermediate Member
Username: Parkerfe
Post Number: 2306
Registered: 9-2001
| | Posted on Monday, May 19, 2003 - 2:58 pm: | |
My ex-330GTC required a valve adjustment every 9k miles I believe. My BB512i calls for a valve adjustment every 18k miles. |
James Selevan (Jselevan)
Member
Username: Jselevan
Post Number: 549
Registered: 6-2002
| | Posted on Sunday, May 18, 2003 - 8:16 pm: | |
Andrew - right you are - "...tongue in cheek..." My 2009 estimate is based on 15,000 to 18,000 miles. This is what is recommended for 1972 Daytona, Dino, 365 GTC/4, etc., with shims and '72 era cam metallurgy.
Jim S. |
Andrew A. Illes (Andyilles)
New member
Username: Andyilles
Post Number: 31
Registered: 10-2002
| | Posted on Sunday, May 18, 2003 - 4:53 pm: | |
Hey there Ken. Though Jim's tongue-in-cheek post is about right, lol, there's something to keep in mind.
In Daytona era cars, we had leaded gas, meaning the engines used "soft" valve seats, which could rely on lead's cushioning effect. Unless your engine has been upgraded to hardened seats, or you're using either leaded Avgas or lead additives, valve/seat erosion will require more frequent adjustment to take up the slack from the erosion. This, of course, would be atop normal wear.
I don't know of any "formula" predicting how fast this progresses, or causes deviation from the standard maintenance schedules, but I'd just say if it were my car, I'd check clearances every year.
The bottom line to your question is that you adjust clearences when they need to be adjusted. |
James Selevan (Jselevan)
Member
Username: Jselevan
Post Number: 543
Registered: 6-2002
| | Posted on Friday, May 16, 2003 - 1:06 pm: | |
Next valve clearance check should be in 2009.
Jim S. |
Ken (Allyn)
Member
Username: Allyn
Post Number: 888
Registered: 10-2001
| | Posted on Friday, May 16, 2003 - 12:31 pm: | |
Just curious: in a Daytona or similar era car, if driven about 3000 miles a year and not raced, how often should valve clearences be adjusted? This is assuming the engine is running strong, no oil consumption, etc. |
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